为什么我的物体不移动？

Question

我有一个程序，我想用键盘按键移动图形。我原本有一个功能来移动图形，只要按下按钮，但我放弃了这种方法来解决键盘重复延迟问题。相反，我决定使用计时器，在KeyPess事件中启用该计时器，并在KeyUp事件中禁用该计时器。起初，我为每个不同的方向使用了4个不同的定时器，虽然它起作用，但我注意到我的程序经常开始冻结。我决定为所有动作使用一个计时器，并使用if语句来确定方向。现在，看起来我的图形根本不动，尽管我所做的只是复制和粘贴代码。

enum Direction 
{ 
    Left, Right, Up, Down 
} 
private Direction _objectDirection; 
int _x = 100, _y = 100; 
private void Form1_Paint(object sender, PaintEventArgs e) 
{ 
Picture.MakeTransparent(Color.Transparent); 
e.Graphics.DrawImage(Picture, _x, _y); 
} 
void Form1_KeyDown(object sender, KeyEventArgs e) 
{ 
    if (e.KeyCode == Keys.W) 
    { 
     if (timerAnimation.Enabled == false) 
     { 
      AnimationMaxFrame = 3; 
      timerAnimation.Enabled = true; 
     } 
     _objectDirection = Direction.Up; 
     timerMovement.Enabled = true; 
    } 
    //The rest of this code is omitted to save space, it is repeated 4 times with the only 
    //changes being the key pressed, and the object direction. 
    Invalidate(); 
} 
void Form1_KeyUp(object sender, KeyEventArgs e) 
{ 
    timerAnimation.Enabled = false; 
    timerMovement.Enabled = false; 
    Picture = Idle; 
    this.Refresh(); 
} 
private void timerMovement_Tick(object sender, EventArgs e) 
{ 
    if (_objectDirection == Direction.Up) 
    { 
     if (_y > 24) 
     { _y = _y - 2; } 
     else 
     { timerMovement.Enabled = false; } 
     //This if statement is to ensure that the object doesn't leave the form. 
     //I have tried removing them already, they're not the problem. 
    } 
    //Again, this is shortened to save space, it is repeated for each direction. 
    Invalidate(); 
} 

什么是阻止我的图形移动，有没有更好的方法来做到这一点？我还想添加很多功能，但它已经冻结了。

Answer 1

不知道你正在使用的WinForms一个游戏，但给点...

您需要处理按键按下事件，当按下按键事件触发设置为根据，如果在你的代码中的布尔标志活动是新闻或发布。然后在您的更新代码中检查标志并相应地进行移动。

这将是这样的（示例代码）：

bool moveup = false; 
void KeyPressed(object sender, KeyEventArgs e) 
{ 
    // check for keys that trigger starting of movement 
    if (e.KeyCode == Keys.W) moveup = true; 
} 
void KeyReleased(object sender, EventEventArgs e) 
{ 
    // check for keys that trigger stopping of movement 
    if (e.KeyCode == Keys.W) moveup = false; 
} 
void TimerTick(obect sender, EventArgs e) 
{ 
    if (moveup) 
    { 
     // move your object 
    } 
}